Reland r165710 "Replace RenderFullScreen with top layer"

Source/core/dom/RenderTreeBuilder.cpp

Index: Source/core/dom/RenderTreeBuilder.cpp
diff --git a/Source/core/dom/RenderTreeBuilder.cpp b/Source/core/dom/RenderTreeBuilder.cpp
index eb3349470a361e14d700027287a9087458299879..b673e5b438f18aa20f3d7099dfe931cb1564e0ca 100644
--- a/Source/core/dom/RenderTreeBuilder.cpp
+++ b/Source/core/dom/RenderTreeBuilder.cpp
@@ -34,7 +34,6 @@
 #include "core/dom/Node.h"
 #include "core/dom/Text.h"
 #include "core/rendering/FlowThreadController.h"
-#include "core/rendering/RenderFullScreen.h"
 #include "core/rendering/RenderNamedFlowThread.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderText.h"
@@ -231,14 +230,6 @@ void RenderTreeBuilder::createRendererForElementIfNeeded()
     RenderObject* nextRenderer = this->nextRenderer();
     element->setRenderer(newRenderer);
     newRenderer->setAnimatableStyle(&style); // setAnimatableStyle() can depend on renderer() already being set.
-
-    if (FullscreenElementStack::isActiveFullScreenElement(element)) {
-        newRenderer = RenderFullScreen::wrapRenderer(newRenderer, parentRenderer, &element->document());
-        if (!newRenderer)
-            return;
-    }
-
-    // Note: Adding newRenderer instead of renderer(). renderer() may be a child of newRenderer.
     parentRenderer->addChild(newRenderer, nextRenderer);
 }